From f2d166bb4f72bf1afc5206f238f0e9123d8241b9 Mon Sep 17 00:00:00 2001
From: Bryan Phelps <bryphe@outlook.com>
Date: Wed, 3 Apr 2019 08:06:18 -0700
Subject: [PATCH] Fix #193: Add place to start 'pre-flight' checks (#214)

* Add a module where we can run tests for invariants for the application

* Fix 193: Add pre-flight checks

* Fix build
---
 src/editor/bin/Oni2.re            |  2 ++
 src/editor/bin/PreflightChecks.re | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 src/editor/bin/PreflightChecks.re

diff --git a/src/editor/bin/Oni2.re b/src/editor/bin/Oni2.re
index 59a56bce89..a3f5ec2cd8 100644
--- a/src/editor/bin/Oni2.re
+++ b/src/editor/bin/Oni2.re
@@ -40,6 +40,8 @@ let init = app => {
   let cliOptions = Core.Cli.parse(setup);
   Sys.chdir(cliOptions.folder);
 
+  PreflightChecks.run();
+
   let currentState = ref(Model.State.create());
 
   let onStateChanged = v => {
diff --git a/src/editor/bin/PreflightChecks.re b/src/editor/bin/PreflightChecks.re
new file mode 100644
index 0000000000..c6d11fda23
--- /dev/null
+++ b/src/editor/bin/PreflightChecks.re
@@ -0,0 +1,17 @@
+/*
+ * PreflightChecks.re
+ *
+ * This establishes and verifies a set of invariants to ensure the environment
+ * is set up correctly for the application to run.
+ */
+
+open Oni_Core;
+
+let checkHomeDirectoryOrThrow = () => {
+  let _ = Filesystem.unsafeFindHome();
+  ();
+};
+
+let run = () => {
+  checkHomeDirectoryOrThrow();
+};